Photocatalytic water decomposition and water-gas shift reactions over NaOH-coated, platinized TiO/sub 2/

Journal Article · Fri May 01 04:00:00 EDT 1981 · J. Catal.; (United States)

OSTI ID:6267959

Sato, S; White, J M

The photocatalytic decomposition of gaseous water takes place over platinized TiO/sub 2/ coated with NaOH (more than 7 wt %). The quantum efficiency of H/sub 2/ and O/sub 2/ production reaches about 7% (20 ..mu..mole H/sub 2//h) at the beginning of the reaction but declines with accumulation of the products due to the thermal back reaction over Pt. The effect of the back reaction can be reduced by increasing the NaOH loading. The photocatalytic activity of platinized TiO/sub 2/ for the water-gas shift reaction increases with increasing NaOH coating. The rates of these photocatalytic reactions are independent of temperature in the range 18 to 50/sup 0/C. In NaOH solution, a pH effect on the rate of water photolysis over platinized TiO/sub 2/ is observed. 6 figures.

• Research Organization: Univ. of Texas, Austin
• OSTI ID: 6267959
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 69:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080104 -- Hydrogen-- Production-- Water Gas Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROXIDES
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLUTIONS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VAPORS
WATER GAS PROCESSES
WATER VAPOR